METHOD FOR RECEIVING SIGNALS IN MULTIPLE USER SYSTEM

• US 20100061222A1
• Filed: 04/20/2007
• Published: 03/11/2010
• Est. Priority Date: 04/24/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Jin Young
• Granted Patent: US 7,835,260 B2
• Time in Patent Office: Days
• US Class Current: 370/203
• CPC Class Codes: H04B 7/028 Spatial transmit diversity using a single antenna at the transmitter
• CPC Class Codes: H04B 7/0434 using multiple eigenmodes
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0634 Antenna weights or vector/matrix coefficients
• CPC Class Codes: H04B 7/12 Frequency diversity

Abstract

This document is related to a method for receiving signals in multi-user system, the method comprising: receiving signals form 2 or more mobile stations using ‘k’-th radio resource and ‘k+m’-th radio resource; estimating a channel matrix using the received signals; calculating a weight matrix so that the channel matrix have an orthogonality to the signals from each of the mobile stations; transmitting the weight matrix to each of the mobile stations; and receiving signals that the weight matrix is applied by each of the mobile stations. By doing so, we can increase the transmission efficiency through obtaining both orthogonality and diversity gain in the multi-user MIMO system.

Claims

1. A method for receiving signals in multi-user system, the method comprising:

receiving signals form 2 or more mobile stations using ‘

k’

-th radio resource and ‘

k+m’

-th radio resource;

estimating a channel matrix using the received signals;

calculating a weight matrix so that the channel matrix have orthogonality to the signals from each of the mobile stations;

transmitting the weight matrix to each of the mobile stations; and

receiving signals that the weight matrix is applied by each of the mobile stations.

2. The method according to claim 1, wherein the radio resources are channels on a time axis.

3. The method according to claim 1, wherein the radio resources are channels on a frequency axis.

4. The method according to claim 1, wherein when the weight matrix is